<template>
  <view>
    <!--使用自定义的搜索组件-->
    <view class="search-box">
      <my-search @click="gotoSearch"></my-search>
    </view>
    <!--轮播图区域-->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :dyration="1000" :circular="true">
      <!--循环渲染轮播图的item项-->
      <swiper-item v-for="(item, i) in swiperList" :key="i">
        <navigator class="swiper-item" :url="'/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id">
          <!--动态绑定图片中的src属性-->
          <image :src="item.image_src"></image>
        </navigator>
      </swiper-item>
    </swiper>
    
    <!-- 分类导航区域-->
    <view class="nav-list">
      <view class="nav-item" v-for="(item, i) in navList" :key="i" @click="navClickHandler(item)">
        <image :src="item.image_src" class="nav-img"></image>
      </view>
    </view>
    
    <!--楼层区域-->
    <!--楼层的容器-->
    <view class="floor-list">
      <!--楼层item项-->
      <view class="floor-item" v-for="(item, i) in floorList" :key="i">
        <!--楼层标题-->
        <image :src="item.floor_title.image_src" class="floor-title"></image>
        <!--楼层图片区域-->
        <view class="floor-img-box">
          <!--左边大图片的盒子-->
          <navigator class="left-img-box" :url="item.product_list[0].url">
            <image :src="item.product_list[0].image_src" :style="{width: item.product_list[0].image_width + 'rpx'}" mode="widthFix"></image>
          </navigator>
          <!--右侧四个小图片的盒子-->
          <view class="right-img-box">
            <navigator class="right-img-item" v-for="(item2, i2) in item.product_list" :key="i2" v-if="i2 !==0" :url="item2.url">
            <image :src="item2.image_src" mode="widthFix" :style="{width: item2.image_width + 'rpx'}"></image>
          </navigator>
          </view>
        </view>
      </view>
    </view>  
  </view>
</template>

<script>
  export default {
    data() {
      return {
        //1.轮播图的数据列表，默认为空数组
        swiperList: [],
        //分类导航的数据列表
        navList: [],
        //楼层的数据列表
        floorList: [],
      };
    },
    onLoad() {
      //2.在小程序页面刚加载的时候，调用获取轮播图数据的方法
      this.getSwiperList()
      this.getNavList()
      this.getFloorList()
    },
    methods: {
      //3.获取轮播图数据的方法
      async getSwiperList() {
        //3.1发起请求
        const { data: res } = await uni.$http.get('/api/public/v1/home/swiperdata')
        //3.2请求失败
        if ( res.meta.status !== 200) return uni.$showMsg()
        //3.3请求成功.为data中的数据赋值
        this.swiperList = res.message
      },
      async getNavList() {
        const { data: res } = await uni.$http.get('/api/public/v1/home/catitems')
        if (res.meta.status !== 200) return uni.$showMsg()
        this.navList = res.message
      },
      //nav-item项被点击时候的事件处理函数
      navClickHandler(item) {
        //判断点击的是哪个nav
        if (item.name === '分类') {
          uni.switchTab({
            url: '/pages/cate/cate'
          })
        }
      }, 
      async getFloorList() {
        const { data: res } = await uni.$http.get('/api/public/v1/home/floordata')
        if (res.meta.status !== 200) return uni.$showMsg()
        
        //通过双层forEach循环，处理URL地址
        res.message.forEach(floor => {
          floor.product_list.forEach(prod => {
            prod.url = '/subpkg/goods_list/goods_list?' + prod.navigator_url.split('?')[1]
          })
        })
        this.floorList = res.message
      },
      
      gotoSearch() {
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
.search-box {
  //设置定位效果为“吸顶”
  position: sticky;
  //吸顶的“位置”
  top: 0;
  //提高层级，防止被轮播图覆盖
  z-index: 999;
}  

swiper {
  height: 330rpx;
  
  .swiper-item,
  image {
    width: 100%;
    height:100%;
  }
}

.nav-list {
  display: flex;
  justify-content: space-around;
  margin: 15px 0;
  
  .nav-img {
    width: 128rpx;
    height: 140rpx;
  }
}

.floor-title {
  height: 60rpx;
  width: 100%;
  display: flex;
}

.right-img-box {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

.floor-img-box {
  display: flex;
  padding-left: 10rpx;
}
</style>
